This paper summarises a new Guide produced by Greenstreet Berman Ltd. for the Energy Institute (EI) Human and Organisational Factors Committee(HOFCOM). Successful change management requires that potential impacts on safety performance are recognised, assessed and proactively managed, and outcomes reviewed and verified. Achieving significant and sustainable change takes effort; the application of sound human and organisational factors techniques can ensure these efforts are directed at the objectives for the change. It can also provide metrics to assess and monitor the risk and safety benefits during and after the change. The guidance is aimed at organisations planning on undertaking change.